Cut an 85mm (3 3/8") hole in the panel and allow a clearance of 70mm (2 3/4”) behind the panel to fit the gauge. Put the gauge in the hole. Using M4 nut and C type bracket to seal up the gauge.
For the GPS antenna, you should securely fasten it in the flat position, black side upwards, preferably outside (or inside front windscreen) so that it has a clear view of the sky to pick up satellite signal. Connect the antenna cable to socket in the back of the gauge. And do not cut cable.
It takes about 30 seconds to get signal in the first time, but less than 3 seconds after that. It gets quicker under a clear view of the sky. Sometimes if signal is missing, pls. reconnect all wires and restart it.
It shows current speed and course(not odometer or trip meter). If you need odometer, pls. search for ASIN B07DXYSJX9, B07DY3MBJL or B07DXNGL24
Red Backlight, 9-32VDC(12VDC/24VDC) Working Voltage, 1 year Warranty, 100% waterproof and anti-fogging protection
Product Features: -Suitable for all vessels, boats, yachts, etc.. -The signal comes directly from the satellite signal receiver(GPS Speed Sensor) -The gauge has the advantages of high precision, quick location confirmation and short start up time. -IP67 waterproof and dustproof grade -Stepper motors used for full range of stepping gauges, great feature with its less power consumption, longer life, higher precision, etc. -With curved glass (with anti-fogging function) -With ultra-wide working voltage design( long-term operating voltage: 9-32V, Maximum up to: 36V (≤ 1 min)).
Technical Data: -Fixing dimension: 85mm(3-3/8") -Indicating Range: 0-80MPH 0-130KM/H -Faceplate Color: Black faceplate with black Stainless Steel. If you need other faceplate, pls. search for B0755D8XNW or B0755D5Y6D -Working Voltage: 9-32VDC(12VDC/24VDC) -Backlight: Red -Functions: current speed and course(not odometer or trip meter) -Connection: Blue wire--Negative/Ground, Red wire--Positive, Orange wire--Positive(lighting wire) -This GPS Speedometer is complete unit, can work directly with gps sensor together, not need other sensor cables. Sensor can be mounted at any position, on or under the dashboard. -After connection, it takes about 30 seconds to get signal in the first time, but less than 3 seconds after that. It gets quicker under a clear view of the sky. Sometimes if signal is missing, pls. reconnect all wires and restart it. -Operation mode: LCD display, stepper motor